The crux is that old bugaboo: the non-compete/non-disclosure clause. According to Microsoft, Miszewski has to wait a full year before competing against his old employer.
Microsoft further claims Miszewski has confidential info that Salesforce can use against it.

Have you ever run into non-compete hassles? Spill the beans at dbarney@redmondmag.com.

Microsoft is planning to activate "Insights for MyAnalytics" sometime late this month for most Office 365 users, but the ability of organizations to manage this feature won't be available until possibly mid-May.